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Page 4693, results 117301 - 117325

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Summary of Tertiary investigations in western Saudi Arabia, current work by the U.S. Geological Survey and recommended future studies
Donald G. Hadley, Dwight Lyman Schmidt, Robert Griffin Coleman
1983, Open-File Report 83-487
In 1936, geologic work related to the Tertiary System in western Saudi Arabia began with a study of the Umm Gerad barite deposit by K. S. Twitchell. In 1944, a study focusing specifically on Tertiary rocks was conducted by Steineke and others near Jiddah. Small-scale mapping of Tertiary sequences began...
Analyses of native water, bottom material, elutriate samples, and dredged material from selected southern Louisiana waterways and selected areas in the Gulf of Mexico, 1979-81
Dee L. Lurry
1983, Open-File Report 82-690
The U.S. Geological Survey was requested by the U.S. Army Corps of Engineers, New Orleans District, to provide water-quality data to evaluate environmental effects of dredging activities in selected reaches of the Calcasieu River in southwestern Louisiana. Samples were collected from the upper and lower Calcasieu River between January 1980...
The nonopaque, detrital heavy mineralogy of the Morrison Formation near Crownpoint, San Juan Basin, New Mexico
Paula L. Hansley
1983, Open-File Report 83-191
Description and quantification of the nonopaque, detrital heavy mineralogy of the Upper Jurassic Morrison Formation in the southwestern part of the San Juan Basin have helped to identify stratigraphic trends, source-area lithologies, and zones of post-depositional alteration possibly related to uranium mineralization. A synthesis of stratigraphic variations in mineral species...
Coal-seismic, desktop computer programs in BASIC; Part 5, Perform X-square T-square analysis and plot normal moveout lines on seismogram overlay
W.P. Hasbrouck
1983, Open-File Report 83-350
Processing of data taken with the U.S. Geological Survey's coal-seismic system is done with a desktop, stand-alone computer. Programs for this computer are written in the extended BASIC language used by the Tektronix 4051 Graphic System. This report presents computer programs to perform X-square/T-square analyses and to plot normal moveout...
Coal-seismic, desktop computer programs in BASIC; Part 6, Develop rms velocity functions and apply mute and normal movement
W.P. Hasbrouck
1983, Open-File Report 83-341
Processing of data taken with the U.S. Geological Survey's coal-seismic system is done with a desktop, stand-alone computer. Programs for this computer are written in the extended BASIC language utilized by the Tektronix 4051 Graphic System. This report presents computer programs used to develop rms velocity functions and apply mute...
Sketches of a hammer-impact, spiked-base, shear-wave source
W.P. Hasbrouck
1983, Open-File Report 83-917
Generation of shear waves in shallow seismic investigations (those to depths usually less than 100 m) can be accomplished by horizontally striking with a hammer either the end of a wood plank or metal structure embedded at the ground surface. The dimensioned sketches of this report are of a steel,...
Garnet peridotites from Williams kimberlites, north-central Montana, U.S.A
B.C. Hearn, E. S. McGee
1983, Open-File Report 83-172
Two Williams kimberlites, 250x350m and 37x390m, in the eastern part of a swarm of 30 middle Eocene alnoitic diatremes in north-central Montana, USA, contain xenoliths of garnet-bearing lherzolites, harzburgites and dunites, in addition to spinel peridotites and upper and lower crustal amphibolites and granulites. Colluvial purple, red, and pink garnets...
Water-resources investigations of the U.S. Geological Survey in the Souris-Red Rivers basin in Minnesota, North Dakota, and South Dakota
J. E. Heisel
1983, Open-File Report 83-218
Information obtained on water resources by Federal and State agencies in the Souris-Red Rivers basin along the Canadian border in the midwestern United States is available for analysis to address flood, drought, and supply problems. It consists of streamflows, ground water measurements, and quality of water determinations. This summary contains...
Microcumpter computation of water quality discharges
Dennis R. Helsel
1983, Open-File Report 82-901
A fully prompted program (SEDQ) has been developed to calculate daily and instantaneous water quality (QW) discharges. It is written in a version of BASIC, and requires inputs of gage heights, discharge rating curve, shifts, and water quality concentration information. Concentration plots may be modified interactively using the display screen....